Has your router re-booted? You can check by looking at the router’s up-time status on its UI. If so, it may have been given a different global IP address by your ISP.
If you are operating in port forwarding mode, the MyCloud does not seem to be able to cope with router IP address changes, and cannot re-connect. It continues to report that all is well, but it cannot actually connect.
The solution in this case is to disable, and then re-enable Cloud Access. This seems to force the MyCloud to re-establish the remote connection.
